When I query postgres for the size of all databases, I'm getting 430 GB.
select pg_size_pretty(sum(pg_database_size(d.datname) ))
from pg_catalog.pg_database d;
> 430 GB
However, Amazon Aurora is reporting "Volume Bytes Used" as 824GB.
This question has some tips for MySQL but I wonder why this would be the case for Postgres: Why is my "volume bytes used" always increasing on my Amazon Aurora cluster?